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Finding the Fourth Proportional to 9,221.30, 12,725.22 and 5,393.30

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Solution

The fourth proportional to 9,221.30, 12,725.22 and 5,393.30 is: 7,442.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,221.30 : 12,725.22 = 5,393.30 : x
  2. Step 2: Convert to fraction form
    9,221.30/12,725.22 = 5,393.30/x
  3. Step 3: Cross multiply
    9,221.30x = 12,725.22 × 5,393.30
  4. Step 4: Simplify right side
    9,221.30x = 68,630,974.32
  5. Step 5: Solve for x
    x = 68,630,974.32/9,221.30
  6. Step 6: Final answer
    x = 7,442.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.